Raspberry Pi Serial Port GPIO

The Raspberry Pi serial port GPIO is on the P1 header. It consists of pin 8, which is UART0_TXD, and pin 10, which is UART0_RXD. These pins, together with a common ground form the basis of serial communications through the BCM2835 mini UART.

The diagram above shows pin 10, and pin 8, together with +5 V and ground. Whether you connect a readymade serial communication adapter, or a homebuilt one, these pins usually require connecting.

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